CVE-2026-20230 : Dettaglio

CVE-2026-20230

8.6
/
Alto
Server-Side Request Forgery - SSRF
A10-Server-Side Req. Forgery (SSRF)
0.02%V4
Network
2026-06-03
18h16 +00:00
2026-06-26
14h58 +00:00
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Gestione notifiche

Descrizioni CVE

A vulnerability in Cisco Unified Communications Manager (Unified CM) and Cisco Unified Communications Manager Session Management Edition (Unified CM SME) could allow an unauthenticated, remote attacker to conduct server-side request forgery (SSRF) attacks through an affected device. This vulnerability is due to improper input validation for specific HTTP requests. An attacker could exploit this vulnerability by sending a crafted HTTP request to an affected device. A successful exploit could allow the attacker to write files to the underlying operating system that could be used later to elevate to root. Note: Cisco has assigned this security advisory a Security Impact Rating (SIR) of Critical rather than High as the score indicates. The reason is that exploitation of this vulnerability could result in an attacker elevating privileges to root. Note: To exploit this vulnerability, the WebDialer service must be enabled. WebDialer is disabled by default.

Informazioni CVE

Vulnerabilità correlate

CWE-ID Nome della vulnerabilità Source
CWE-918 Server-Side Request Forgery (SSRF)
The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.

Metriche

Metriche Punteggio Gravità CVSS Vettore Source
V3.1 8.6 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N

Base: Exploitabilty Metrics

The Exploitability metrics reflect the characteristics of the thing that is vulnerable, which we refer to formally as the vulnerable component.

Attack Vector

This metric reflects the context by which vulnerability exploitation is possible.

Network

The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).

Attack Complexity

This metric describes the conditions beyond the attacker’s control that must exist in order to exploit the vulnerability.

Low

Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success when attacking the vulnerable component.

Privileges Required

This metric describes the level of privileges an attacker must possess before successfully exploiting the vulnerability.

None

The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.

User Interaction

This metric captures the requirement for a human user, other than the attacker, to participate in the successful compromise of the vulnerable component.

None

The vulnerable system can be exploited without interaction from any user.

Base: Scope Metrics

The Scope metric captures whether a vulnerability in one vulnerable component impacts resources in components beyond its security scope.

Scope

Formally, a security authority is a mechanism (e.g., an application, an operating system, firmware, a sandbox environment) that defines and enforces access control in terms of how certain subjects/actors (e.g., human users, processes) can access certain restricted objects/resources (e.g., files, CPU, memory) in a controlled manner. All the subjects and objects under the jurisdiction of a single security authority are considered to be under one security scope. If a vulnerability in a vulnerable component can affect a component which is in a different security scope than the vulnerable component, a Scope change occurs. Intuitively, whenever the impact of a vulnerability breaches a security/trust boundary and impacts components outside the security scope in which vulnerable component resides, a Scope change occurs.

Changed

An exploited vulnerability can affect resources beyond the security scope managed by the security authority of the vulnerable component. In this case, the vulnerable component and the impacted component are different and managed by different security authorities.

Base: Impact Metrics

The Impact metrics capture the effects of a successfully exploited vulnerability on the component that suffers the worst outcome that is most directly and predictably associated with the attack. Analysts should constrain impacts to a reasonable, final outcome which they are confident an attacker is able to achieve.

Confidentiality Impact

This metric measures the impact to the confidentiality of the information resources managed by a software component due to a successfully exploited vulnerability.

None

There is no loss of confidentiality within the impacted component.

Integrity Impact

This metric measures the impact to integrity of a successfully exploited vulnerability. Integrity refers to the trustworthiness and veracity of information.

High

There is a total loss of integrity, or a complete loss of protection. For example, the attacker is able to modify any/all files protected by the impacted component. Alternatively, only some files can be modified, but malicious modification would present a direct, serious consequence to the impacted component.

Availability Impact

This metric measures the impact to the availability of the impacted component resulting from a successfully exploited vulnerability.

None

There is no impact to availability within the impacted component.

Temporal Metrics

The Temporal metrics measure the current state of exploit techniques or code availability, the existence of any patches or workarounds, or the confidence in the description of a vulnerability.

Environmental Metrics

These metrics enable the analyst to customize the CVSS score depending on the importance of the affected IT asset to a user’s organization, measured in terms of Confidentiality, Integrity, and Availability.

psirt@cisco.com

CISA KEV (Known Exploited Vulnerabilities)

Nome della vulnerabilità : Cisco Unified Communications Manager Server-Side Request Forgery (SSRF) Vulnerability

Azione richiesta : Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

Utilizzata in campagne ransomware : Unknown

Aggiunta : 2026-06-25 00h00 +00:00

Scadenza dell'azione : 2026-06-28 00h00 +00:00

Informazione importante
Questa CVE è identificata come vulnerabile e rappresenta una minaccia attiva, secondo il Catalogo delle vulnerabilità sfruttate conosciute (CISA KEV). La CISA ha inserito questa vulnerabilità nell'elenco delle vulnerabilità attivamente sfruttate dai criminali informatici, sottolineando l'importanza di intervenire immediatamente per correggere questa falla. È fondamentale dare priorità all'aggiornamento e alla correzione di questa CVE per proteggere i sistemi da potenziali attacchi informatici.

EPSS

EPSS è un modello di punteggio che prevede la probabilità che una vulnerabilità venga sfruttata.

Punteggio EPSS

Il modello EPSS produce un punteggio di probabilità compreso tra 0 e 1 (da 0 a 100%). Più alto è il punteggio, maggiore è la probabilità che una vulnerabilità venga sfruttata.

Percentile EPSS

Il percentile viene utilizzato per classificare le CVE in base al loro punteggio EPSS. Ad esempio, una CVE al 95° percentile secondo il suo punteggio EPSS ha una probabilità maggiore di essere sfruttata rispetto al 95% delle altre CVE. Il percentile consente quindi di confrontare il punteggio EPSS di una CVE con quello delle altre.

Products Mentioned

Configuraton 0

Cisco>>Unified_communications_manager >> Version From (including) 14.0 To (excluding) 14su6

Cisco>>Unified_communications_manager >> Version From (including) 14.0 To (excluding) 14su6

Cisco>>Unified_communications_manager >> Version From (including) 15.0 To (including) 15su4a

Cisco>>Unified_communications_manager >> Version From (including) 15.0 To (including) 15su4a

Riferimenti